Abstract
Application of a mixed design in the evaluation of talkative interaction. The interaction between a baby and his educator was studied using a mixed research design. The investigation took place in a natural context, within the framework of a Center of Welcome. The observational methodology offers important possibilities in order to analyze this type of data. From the historical point of view the analysis of categorical data is associated to the statistical debate between Pearson and Yule. Pearson considered that the biva ri ate continuous distributions underline the tables of cross classification, and the associations could be described by means of correlations, as it is the case for continuous va ri ables. One of the measures proposed was the tetracoric correlation and the contingency coefficient. In this research mixed design was used in order to obtain a more complete information.
